Getting a certain value from inside brackets.

[LeoT]

Hi there,
I'm a beginner so this problem might be very ease to solve. Nevertheless I posted this question a few days ago and got no helping answer. I hope that someone of you has an idea.

I'm doing a GET request:
requests.get('https://api.xyz.cloud/api/sites/%s?detailed=true' % xyz_site_id, timeout=None, headers=self.headers).json()
to a device that responds with the following raw data:

[{u'address': {u'altitude': None,
               u'area': u'',
               u'buildingNumber': None,
               u'country': None,
               u'latitude': None,
               u'longitude': None,
               u'street': u'',
               u'zip': u''},
  u'id': 63XXXX,
  u'levelOfAccess': None,
  u'name': u'Schuppen',
  u'siteKey': u'YBCL-HXXX'}]

I basically want to save the value of 'siteKey', meaning YBCL-HXXX into a variable to use this variable for further actions...

I had this problem before and could solve it using this method:

variableX = exampledata['siteKey']

Nevertheless, when using this method now I get the following error:
TypeError: list indices must be integers, not str

Btw. I have to use Python 2.7 due to various reasons...

I think it has to do with a different format of the raw data (a 'list').
I'm searching for a solution for hours now and hope that some of you can help me...
Best,
Leo